Помогите дать ответ. Why are some people too much addicted to computers?

People do not have self control and can't restrict themselves from playing computer games or surfing the Internet. May be these people do not have hobbies and their free time they spent surfing the Internet. 

I think some people are too much addicted to computers maybe because they are crazy or virtual life replaced their real life. Computers can take a lot of time because it is a multifunctional device and very hard do not become depend of it.